Flora of North America species comparison

never tuberous.

tuberous, 2.5-5 mm thick.

erect, never rooting nodally, strigose or hirsute, base bulbous and cormlike.

erect, 2.5-7.5 cm, glabrous, each with 1-4 flowers.

blades ovate to cordate in outline, 3-foliolate, rarely merely deeply divided, 2–5.3 × 2.4–5.4 cm, leaflets 1–2x-lobed, ultimate segments oblong to obovate, margins toothed, apex rounded in outline.

persistent, blades obdeltate in outline, 1-2.8 cm, segments 0.2-0.6 cm wide, deeply divided into 3 oblanceolate segments with lateral segments often again lobed or parted, base long-attenuate, margins entire, apex rounded.

receptacle pubescent;

sepals reflexed 2–3 mm above base, 6–9 × 2–4 mm, pilose;

petals 5, yellow, 9–13 × 8–11 mm.

pedicels glabrous;

receptacle glabrous or sparsely pilose;

sepals 3-7 × 1.5-3 mm, abaxially glabrous;

petals 5, 6-12 × 2-5 mm;

nectary scale glabrous.

ovoid, 6–9 × 5–7 mm;

achenes 2.2–3.2 × 2.2–2.8 mm, glabrous, margin forming narrow rib 0.1–0.2 mm wide;

beak persistent, lanceolate to deltate, 0.2–0.8 mm, slender tip hooked when present.

globose to cylindric, 3.5-8 × 3-7 mm;

achenes 1.1-1.4 × 0.8-1.1 mm, finely pubescent;

beak subulate, straight, 0.2-0.8 mm.